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The Weistec M156 Stage I, Stage II, Stage III, and 50 State legal CARB certified supercharger offering for the naturally aspirated 63 AMG motors has been updated along with price drops. Weistec officially announces the Stage 3 system as well which includes the updated 3.0 liter twin screw blower. The Stage III setup is capable of 1000 horsepower but of course without a built motor including forged pistons and rods the motor will not reach this output.

Stage I

Let's start with the Stage I whose price is now $12,999.99 and rated at 534 wheel horsepower and 560 pound-feet of wheel torque:

If the Stage I is not enough power (and when is it ever enough power?) the Stage II is available for the same price of $12,999.99 which should make it fairly easy for one to choose this Stage for a bit more power and torque over the Stage I:

Here is the big boy Stage III featuring the 3.0 liter twin screw upgrade from the 2.3 liter. Power output on stock internals for this stage is 630 wheel horsepower. This is good for just under a 100 wheel horsepower gain on top of the Stage II. And at a price of $15,780.99 it is difficult to not encourage someone in the market to pay the difference and step up to the largest power offering possible on the stock internals with room to grow with built internals should one desire it. And with there never being enough horsepower this is definitely a smart way to go with future growth in mind.

If one is concerned about emissions and the environment (the responsible AMG owner) there is also the 50 State Legal system which is CARB certified. It does offer the least amount of power but is safe for the environment and compliant with emissions laws which certainly is important. This setup will provide "only" 501 wheel horsepower which certainly is more than enough for the vast majority of 63 AMG owners who wish to simply supercharge and not have to worry about emissions legality or testing. Pricing is $13,499.99.

By dropping prices and expanding the product offering Weistec proves it is well aware of the economic climate remaining very competitive and assertive offering multiple packages depending on customer desire and needs. Weistec is able to cater to any M156 owner and the dollar per horsepower ratio here is hard to argue against and naturally aspirated M156 motors simply will not be able to match the power, torque, and potential of these supercharger setups. Congratulations to Weistec for adjusting to the market and continuing to raise the bar.

Gentlemen, we are very excited to release our new packages and allow current and future customers to enjoy even more power if the wish with our new Stage 3 Supercharger System.

George that is correct. It is 11psi of boost with the 3.0L. It puts the new 3.0L right in its sweet spot in terms of efficiency and power output. We do recommend our Bullet Proof Transmission upgrade for increased longevity, but the is up to the customer.

The new 3.0L system when turned up can make past 800hp at the wheels (837whp to be exact) and this is at 18 psi of boost. Of course this can only be done with our forged internals and fuel system. Let us know how we can assist!

Gentlemen, we are very excited to release our new packages and allow current and future customer to enjoy even more power if the wish wit our new Stage 3 Supercharger System.

George that is correct. It is 11psi of boost with the 3.0L. It puts the new 3.0L right in its sweet spot in terms of efficiency and power output. We do recommend our Bullet Proof Transmission upgrade for increased longevity, but the is up to the customer.

The new 3.0L system when turned up can make past 800hp at the wheels (837whp to be exact) and this is at 18 psi of boost. Of course this can only be done with our forged internals and fuel system. Let us know how we can assist!

Weistec Engineering

Congratulations guys, well done and the price drop is of course nice to see.

So 837 wheel with the fuel system and built motor, a gain of about 200 whp at the same compression with another 7 psi, correct?

To be fair, the 837 hp at the wheels was done with 18psi, MS109 race gas and a tune specifically designed around this, but yes that is correct. The M156 is a great engine that has flow characteristics that are truly unmatched.

To be fair, the 837 hp at the wheels was done with 18psi, MS109 race gas and a tune specifically designed around this, but yes that is correct. The M156 is a great engine that has flow characteristics that are truly unmatched.

Weistec Engineering

Thank you.

The blower is not maxed in any package even with the built internals, correct?

why do u have a 3 liter supercharger!!!! u will never max out ur 2.3 liter sc cause the engine will not hold more boost cz its not forged
whats the benifit of the 3 liter sc

Well saying it won't max the 2.3 liter may not be accurate.

The M156 is a very efficient motor and the heads move a good amount of air. A motor with high volumetric efficiency to begin with will max smaller blowers pretty quickly. As you can see by going from the 2.3 liter to the 3.0 even on the stock internals provides a large horsepower and torque gain.

Also, the larger blower will likely be able to move more air on pump gas before detonation. When you compress air you heat it so the smaller blower would have to work harder and essentially be spun faster to keep up possibly being moved out of its best range of efficiency. Also probably needing higher octane fuel as well. The 3.0 also gives you much more head room.

I think what he is trying to say is you need built internals to max the 2.3 liter which does not appear to be accurate. You pushed it fairly far with race gas. The 2.3 obviously won't support the hp you are now making with the 3.0.